#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/LiveInterval.h"
#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/IndexedMap.h"
namespace llvm {
class LiveVariables;
class MRegisterInfo;
class TargetInstrInfo;
+ class TargetRegisterClass;
class VirtRegMap;
class LiveIntervals : public MachineFunctionPass {
Reg2RegMap r2rMap_;
BitVector allocatableRegs_;
+ DenseMap<const TargetRegisterClass*, BitVector> allocatableRCRegs_;
+
+ /// JoinedLIs - Keep track which register intervals have been coalesced
+ /// with other intervals.
+ BitVector JoinedLIs;
public:
struct CopyRec {
return I->second;
}
+ bool hasInterval(unsigned reg) const {
+ return r2iMap_.count(reg);
+ }
+
/// getMBBStartIdx - Return the base index of the first instruction in the
/// specified MachineBasicBlock.
unsigned getMBBStartIdx(MachineBasicBlock *MBB) const {
}
private:
+ /// isRemoved - returns true if the specified machine instr has been
+ /// removed.
+ bool isRemoved(MachineInstr* instr) const {
+ return !mi2iMap_.count(instr);
+ }
+
/// RemoveMachineInstrFromMaps - This marks the specified machine instr as
/// deleted.
void RemoveMachineInstrFromMaps(MachineInstr *MI) {
/// CopyCoallesceInMBB - Coallsece copies in the specified MBB, putting
/// copies that cannot yet be coallesced into the "TryAgain" list.
void CopyCoallesceInMBB(MachineBasicBlock *MBB,
- std::vector<CopyRec> &TryAgain);
+ std::vector<CopyRec> *TryAgain, bool PhysOnly = false);
+
/// JoinCopy - Attempt to join intervals corresponding to SrcReg/DstReg,
/// which are the src/dst of the copy instruction CopyMI. This returns true
/// if the copy was successfully coallesced away, or if it is never possible
/// to coallesce these this copy, due to register constraints. It returns
/// false if it is not currently possible to coallesce this interval, but
/// it may be possible if other things get coallesced.
- bool JoinCopy(MachineInstr *CopyMI, unsigned SrcReg, unsigned DstReg);
+ bool JoinCopy(MachineInstr *CopyMI, unsigned SrcReg, unsigned DstReg,
+ bool PhysOnly = false);
/// JoinIntervals - Attempt to join these two intervals. On failure, this
/// returns false. Otherwise, if one of the intervals being joined is a
LiveInterval &interval,
unsigned SrcReg);
+ /// handleLiveInRegister - Create interval for a livein register.
+ void handleLiveInRegister(MachineBasicBlock* mbb,
+ unsigned MIIdx,
+ LiveInterval &interval);
+
/// Return true if the two specified registers belong to different
/// register classes. The registers may be either phys or virt regs.
bool differingRegisterClasses(unsigned RegA, unsigned RegB) const;
bool AdjustCopiesBackFrom(LiveInterval &IntA, LiveInterval &IntB,
MachineInstr *CopyMI);
- bool overlapsAliases(const LiveInterval *lhs,
- const LiveInterval *rhs) const;
+ /// lastRegisterUse - Returns the last use of the specific register between
+ /// cycles Start and End. It also returns the use operand by reference. It
+ /// returns NULL if there are no uses.
+ MachineInstr *lastRegisterUse(unsigned Reg, unsigned Start, unsigned End,
+ MachineOperand *&MOU);
+
+ /// findDefOperand - Returns the MachineOperand that is a def of the specific
+ /// register. It returns NULL if the def is not found.
+ MachineOperand *findDefOperand(MachineInstr *MI, unsigned Reg);
+
+ /// unsetRegisterKill - Unset IsKill property of all uses of the specific
+ /// register of the specific instruction.
+ void unsetRegisterKill(MachineInstr *MI, unsigned Reg);
+
+ /// hasRegisterDef - True if the instruction defines the specific register.
+ ///
+ bool hasRegisterDef(MachineInstr *MI, unsigned Reg);
static LiveInterval createInterval(unsigned Reg);
+ void removeInterval(unsigned Reg) {
+ r2iMap_.erase(Reg);
+ }
+
LiveInterval &getOrCreateInterval(unsigned reg) {
Reg2IntervalMap::iterator I = r2iMap_.find(reg);
if (I == r2iMap_.end())